.header .logo {
    width: 140px;
    height: 30px;
    background: url('../images/logo.png') no-repeat center;
    /*  rgba(255, 255, 255, 0.1) */
    background-size: 100% 100%;
    margin: 16px 28px 16px 0;
    float: left;
}

.site-layout-background {
    background: #fff;
}

.ant-layout,.site-layout-background,.ant-layout-sider-children{
    min-height: 100%;
}
/* 安全退出 */
.logout{
    position: absolute;
    top:15px;
    right: 15px;
}